The Role of IGG4 in Immunity Suppression | IgG4 and immunosupression | With Professor Robert Clancy And there's a huge interest in a particular antibody molecule in blood that's appearing in people who have three or more uh messenger RNA vaccines and it's called Igg 4. Now what is Igg 4? Well everybody knows in blood there's antibody and they know that antibody can cause mediate Protection. Okay, that's pretty straightforward. Yeah, the main antibody happens to be a protein which is given the te